JP6763240B2 - Valve mechanism and manufacturing method of valve mechanism - Google Patents

Description

The present invention relates to a valve mechanism applicable to a recording device that injects ink onto a recording medium to perform recording, and a method for manufacturing the valve mechanism.

For example, there is known an inkjet recording device that ejects a liquid (ink) as droplets onto a recording medium and records the data on the recording medium. In such an inkjet recording device, ink is supplied to the recording head from a liquid storage means such as an ink tank via a supply tube such as a tube, and the ink supplied from the liquid storage means is liquid from the nozzle opening of the recording head. Some are sprayed as drops. Further, it has been proposed that a valve unit (valve mechanism), which is a pressure adjusting valve, is provided in the middle of the ink flow path so that the ink supplied from the liquid storage means is supplied to the recording head at a predetermined pressure. (For example, Patent Document 1).

The valve unit described in Patent Document 1 has a valve seat provided in an ink flow path and a valve body. The valve seat has a structure in which a support member and a water-repellent abutting member are laminated. The valve body separates and contacts the water-repellent portion (contact member) of the valve seat to open and close the ink flow path.
Since the contact member is formed separately from the support member, the contact member can be sufficiently water-repellent without adversely affecting the support member. As a result, it becomes difficult for ink to accumulate on the portion (contact member) where the valve body of the valve seat comes into contact with each other, so that the problem that the ink flow path is not normally opened and closed by the accumulated ink is suppressed for a long period of time. be able to.

Japanese Unexamined Patent Publication No. 2016-022704

However, in the valve unit described in Patent Document 1, for example, a structure in which the support member and the contact member are laminated is not properly formed due to deformation or misalignment, and the support member and the contact member are laminated. There was a risk that the part would interfere with the valve body and the valve body would not operate normally.

The present invention has been made to solve at least a part of the above-mentioned problems, and can be realized as the following forms or application examples.

[Application Example 1] The valve mechanism according to this application example includes a valve seat having a hole that serves as a flow path for a liquid, a valve body that opens and closes the flow path by relative movement between the valve seat, and the valve. A first surface fixed to one of the seat and the valve body, a second surface separated from the other of the valve seat and the valve body, and a third surface intersecting the first surface and the second surface. An opening member having a surface, an opening penetrating the first surface and the second surface, a fixing member for fixing one of the surfaces and the first surface, and the direction from the opening toward the third surface. It is characterized by including an inclined portion for increasing the distance between one side and the first surface.

The valve mechanism according to this application example is fixed to the valve seat, the valve body that opens and closes the flow path of the liquid by relative movement between the valve seats, and one of the valve seat and the valve body (hereinafter, simply referred to as one). An opening member having a first surface to be formed, a second surface to be separated and abutted from the other side of the valve seat and the valve body (hereinafter, simply referred to as the other), a third surface, and an opening through which the valve body is penetrated. One and the opening member are fixed by a fixing member. That is, the valve mechanism according to the present application example has a structure in which one, the fixing member, and the opening member are laminated, and the valve body moves relative to the portion where one, the fixing member, and the opening member are laminated. Opens and closes the flow path of the liquid.

Further, in the portion where one, the fixing member, and the opening member are laminated, an inclined portion for increasing the distance between the one and the opening member is provided in the direction from the opening toward the third surface. When the fixing member is arranged on the inclined portion, when the distance between one side and the opening member is narrowed, a force in the direction from the opening to the third surface acts on the fixing member from the inclined portion.
When the fixing member is uncured or has fluidity due to the thermoplasticity of the fixing member, the fixing member is moved from the opening to the third surface by the force acting from the inclined portion on the fixing member in the direction from the opening to the third surface. Since it is easy to flow in the direction toward the third surface, it is easy to project toward the third surface side, and it is difficult to flow in the direction from the third surface toward the opening, so that it is difficult to project toward the opening side.

Therefore, in the portion (structure) in which one of the fixing member and the opening member are laminated, the fixing member is unlikely to project toward the opening side. Therefore, in the portion (structure) where one of the fixing member and the opening member are laminated, the fixing member closes the opening and the function of the valve mechanism is hindered (the valve mechanism may not operate normally). It can be suppressed.

[Application Example 2] In the valve mechanism according to the application example, the second surface has an inclined surface that increases the distance between the second surface and the third surface in the direction from the opening toward the third surface. Is also preferably provided near the opening.

When the second surface to be detached from the other has an inclined surface that increases the distance from one side closer to the opening than the third surface, the liquid is guided toward the opening side by the inclined surface and is guided to the side of the opening. It becomes easy to flow. For example, when a deteriorated liquid or a bubble is present in the flow path of the liquid, the deteriorated liquid or the bubble is easily discharged through the opening.

[Application Example 3] In the valve mechanism according to the application example, the second surface further has an outer peripheral surface arranged on the side of the third surface with respect to the inclined surface, and the outer peripheral surface is inclined. It is preferable that the liquid repellency is higher than that of the surface.

The outer peripheral surface having higher liquid repellency than the inclined surface repels the liquid. For example, when the coloring material or resin is dispersed in the liquid, the coloring material or resin is less likely to be deposited on the outer peripheral surface. Further, the inclined surface having a lower liquid repellency than the outer peripheral surface repels air bubbles, and the air bubbles are less likely to accumulate in the vicinity of the opening.

[Application Example 4] In the valve mechanism according to the above application example, the opening member has a burr bent in a direction from the second surface toward the first surface at the edge of the opening, and the tip of the burr is It is preferable to bite into one of the above.

When the tip of the burr bites into one side, the tip of the burr acts as a kind of anchor bolt, and the position of the opening member with respect to one side becomes difficult to change. Therefore, in the portion (structure) where one, the fixing member, and the opening member are laminated, the position of the opening member changes, so that the opening member interferes with the valve body or the opening member and the other do not come into contact with each other. As a result, it is possible to suppress a problem that the function of the valve mechanism is impaired (the valve mechanism may not operate normally).

[Application Example 5] In the valve mechanism according to the above application example, the inclined portion is closer to the first inclined portion arranged closer to the opening than the third surface and closer to the third surface than the opening. It is preferable to have a second inclined portion to be arranged.

When the distance between one and the opening member is narrowed, a force from both the first inclined portion and the second inclined portion acts on the fixing member in the direction from the opening to the third surface. Therefore, the fixing member moves from the third surface toward the opening as compared with the case where a force in the direction from the opening toward the third surface acts on the fixing member from either the first inclined portion or the second inclined portion. It becomes more difficult to flow in the direction, and it becomes more difficult to project toward the opening side.

[Application Example 6] The valve mechanism according to the present application example is formed by relative movement between a valve seat having a recess and a hole provided inside the recess and serving as a flow path for a liquid, and the valve seat. A valve body that opens and closes the flow path, a first surface that is fixed to the valve seat, a second surface that the valve body comes into contact with each other, and a third surface that intersects the first surface and the second surface. It is characterized by including an opening member having an opening penetrating the first surface and the second surface, and a fixing member for fixing the valve seat and the first surface.

If the fixing member is uncured or the fixing member has fluidity due to the thermoplasticity of the fixing member and protrudes from between the valve seat and the opening member, the recess becomes a saucer for the protruding fixing member, and the protruding fixing member becomes a recess. Since it is difficult to reach the hole provided inside the hole, it is difficult for the protruding fixing member to block the hole (liquid flow path).
In addition, even if the valve seat is deformed, since the hole serving as a flow path is inside the recess, the hole can be less susceptible to the deformation of the valve seat.

[Application Example 7] In the valve mechanism according to the above application example, it is preferable that the opening is arranged inside the recess and the hole is arranged inside the opening when viewed from the direction of the relative movement.

When viewed from the direction of relative movement of the valve body, the opening is arranged between the inner peripheral surface of the concave portion and the hole, so that the opening is not arranged between the inner peripheral surface of the concave portion and the hole. Since the distance between the inner peripheral surface of the recess and the hole can be lengthened, it becomes more difficult for the protruding fixing member to reach the hole, and the protruding fixing member becomes more difficult to block the hole (liquid flow path).

[Application Example 8] The valve mechanism according to the above application example further includes an inclined portion that increases the distance between the valve seat and the first surface in the direction from the opening toward the third surface. Is preferable.

When the fixing member is arranged on the inclined portion and the distance between one and the opening member is narrowed, a force in the direction from the opening to the third surface acts on the fixing member from the inclined portion.
When the fixing member is uncured or has fluidity due to the thermoplasticity of the fixing member, the fixing member is moved from the opening to the third surface by the force acting from the inclined portion on the fixing member in the direction from the opening to the third surface. Since it is easy to flow in the direction toward the three surfaces, it is easy to project toward the third surface side, and it is difficult to flow in the direction from the third surface toward the opening, so that it is difficult to project toward the opening side.

Therefore, in the portion (structure) in which one of the fixing member and the opening member are laminated, the fixing member is unlikely to project toward the opening side and is unlikely to interfere with the valve body penetrating the opening. Therefore, in the portion (structure) where one of the fixing member and the opening member are laminated, the fixing member interferes with the valve body and the relative movement of the valve body is hindered (the valve body may not operate normally). ) Can be suppressed.

[Application Example 9] In the valve mechanism according to the above application example, the second surface further has an inclined surface that increases the distance between the valve seat and the valve seat in the direction from the opening toward the third surface. It is preferable that the surface is provided closer to the opening than the three surfaces.

When the second surface to be detached from the other has an inclined surface that increases the distance from one side closer to the opening than the third surface, the liquid is guided toward the opening side by the inclined surface and is guided to the side of the opening. It becomes easy to flow. For example, when a deteriorated liquid or a bubble is present in the flow path of the liquid, the deteriorated liquid or the bubble is easily discharged through the opening.

[Application Example 10] In the valve mechanism according to the application example, the second surface further has an outer peripheral surface arranged on the side of the third surface with respect to the inclined surface, and the outer peripheral surface is inclined. It is preferable that the liquid repellency is higher than that of the surface.

The outer peripheral surface having higher liquid repellency than the inclined surface repels the liquid. For example, when the coloring material or resin is dispersed in the liquid, the coloring material or resin is less likely to be deposited on the outer peripheral surface. Further, the inclined surface having a lower liquid repellency than the outer peripheral surface repels air bubbles, and the air bubbles are less likely to stay near the opening.

[Application Example 11] In the valve mechanism according to the above application example, the inclined portion is closer to the first inclined portion arranged closer to the opening than the third surface and closer to the third surface than the opening. It is preferable to have a second inclined portion to be arranged.

When the distance between one and the opening member is narrowed, a force from both the first inclined portion and the second inclined portion acts on the fixing member in the direction from the opening to the third surface. Therefore, the fixing member moves from the third surface toward the opening as compared with the case where a force in the direction from the opening toward the third surface acts on the fixing member from either the first inclined portion or the second inclined portion. It becomes more difficult to flow in the direction, and it becomes more difficult to project toward the opening side.

[Application Example 12] In the valve mechanism according to the above application example, the valve seat further has a convex portion, and the opening member is arranged inside the convex portion when viewed from the direction of the relative movement. Is preferable.

If the convex portion is an alignment mark for detecting the position of the valve seat, the position of the valve seat can be correctly grasped by the convex portion, and the opening member can be arranged at a predetermined position of the valve seat with high accuracy.
Therefore, in the portion (structure) in which one, the fixing member, and the opening member are laminated, the opening member may interfere with the valve body or the opening member and the other may not come into contact with each other due to the positional deviation of the opening member. It is possible to suppress a problem that the function of the mechanism is hindered (the valve mechanism may not operate normally).

[Application Example 13] In the valve mechanism according to the above application example, it is preferable that the flow path resistance between the valve seat and the first surface gradually decreases from the opening side toward the third surface side.

When the flow path resistance between the valve seat and the first surface gradually decreases from the opening side toward the third surface side, the fixing member can easily flow toward the third surface side rather than the opening side. Therefore, in the portion (structure) where one of the fixing member and the opening member are laminated, the fixing member closes the opening and the function of the valve mechanism is hindered (the valve mechanism may not operate normally). It can be suppressed.

[Application Example 14] In the method for manufacturing a valve mechanism according to the application example of the present specification, the valve mechanism moves the flow path relative to the valve seat having a hole serving as a flow path for the liquid and the valve seat. A valve body that opens and closes, a first surface that is fixed to one of the valve seat and the valve body, a second surface that is separated and abutted from the valve seat and the other of the valve body, and the first surface and the said An opening member having a third surface intersecting the second surface and an opening penetrating the first surface and the second surface and penetrating the valve body is provided between the one surface and the first surface. , The step of arranging the fixing member and the distance between the one and the first surface are narrowed so that the amount of movement of the fixing member is larger toward the third surface side than the opening side. It is characterized by including a step of moving the fixing member and a step of curing the fixing member.

When the fixing member is arranged on one side and between the first surface (opening member) and the fixing member is cured so that the amount of movement of the fixing member is larger on the third surface side than on the opening side. Since the amount of movement of the fixing member is smaller on the opening side than on the third surface, it becomes difficult for the fixing member to close the opening.
Therefore, when forming a structure in which one of the fixing member and the opening member are laminated, the fixing member closes the opening and the function of the valve mechanism is hindered (the valve mechanism may not operate normally). Can be suppressed.

[Application Example 15] In the method for manufacturing a valve mechanism according to the above application example, the opening member is punched in a direction from the second surface toward the first surface to open the opening before the step of arranging the fixing member. It is preferable to further include a step of forming.

For example, when an opening member is punched out from the second surface toward the first surface using a die (tool) to form an opening, a burr bent in the direction from the second surface toward the first surface is used as the edge of the opening. Can be formed. Therefore, it is easy to move the fixing member more toward the third surface side than the opening side by this burr.

[Application Example 16] It is preferable that the method for manufacturing a valve mechanism according to the above application example further includes a step of forming a liquid repellent film on the second surface before the step of forming the opening.

When the opening member is punched in the direction from the second surface to the first surface using a mold (tool) with the liquid repellent film formed on the second surface, the direction from the second surface to the first surface A curved inclined surface (an inclined surface that increases the distance from one side) can be formed on the second surface. That is, an inclined surface bent in the direction from the second surface to the first surface and an outer peripheral surface arranged on the side of the third surface with respect to the inclined surface can be formed on the second surface.

Further, since the die (tool) comes into contact with the inclined surface bent in the direction from the second surface to the first surface when punching the opening member, the liquid repellent film covering the inclined surface is substantially scraped off. .. Since the die (tool) does not come into contact with the outer peripheral surface when the opening member is punched out, the liquid repellent film covering the outer peripheral surface remains. Therefore, the liquid repellency of the outer peripheral surface can be enhanced as compared with the inclined surface. Further, the inclined surface having a lower liquid repellency than the outer peripheral surface repels air bubbles, and the air bubbles are less likely to accumulate in the vicinity of the opening.

[Application Example 17] In the method for manufacturing a valve mechanism according to the above application example, in the step of forming the opening, a burr bent in a direction from the second surface toward the first surface is formed on the edge of the opening. In the step of moving the fixing member, it is preferable that the tip of the burr bites into one of the burrs.

In the process of forming the opening, a burr bent in the direction from the second surface to the first surface is formed on the edge of the opening, and in the process of moving the fixing member, when the tip of the burr bites into one side, the tip of the burr is a kind. It acts as an anchor bolt, and the position of the opening member with respect to one side is less likely to change. Therefore, in the portion (structure) where one of the fixing member and the opening member are laminated, the opening member may interfere with the valve body or the opening member and the valve body may not come into contact with each other due to the change in the position. It is possible to suppress a problem that the function of the valve mechanism is impaired (the valve mechanism may not operate normally).

[Application Example 18] In the method for manufacturing a valve mechanism according to the above application example, the flow path resistance between the one side and the first surface gradually decreases from the opening side toward the third surface side. It is preferable to include a step of providing the groove on the one side or the first surface.

When the flow path resistance between one side and the first surface gradually decreases from the opening side toward the third surface side, the fixing member can easily flow toward the third surface side rather than the opening side. Therefore, in the portion (structure) where one of the fixing member and the opening member are laminated, the fixing member closes the opening and the function of the valve mechanism is hindered (the valve mechanism may not operate normally). It can be suppressed.

[Application Example 19] In the method for manufacturing a valve mechanism according to the present application example, the valve mechanism includes a valve seat having a recess, a hole provided inside the recess and serving as a flow path for a liquid, and the valve seat. A valve body that opens and closes the flow path by relative movement between the two, a first surface that is fixed to the valve seat, a second surface that the valve body comes into contact with each other, and the first surface and the second surface. A valve seat and an opening member having an opening that penetrates the first surface and the second surface, and a fixing member that fixes the valve seat and the first surface. It is characterized by including a step of arranging a fixing member between the first surfaces and a step of crimping the valve seat and the first surface.

When the fixing member protrudes from between the valve seat and the opening member by the step of arranging the fixing member between the valve seat and the first surface (opening member) and the step of crimping the valve seat and the opening member, the recess is formed. , It becomes a saucer for the protruding fixing member, and it becomes difficult for the protruding fixing member to reach the hole provided inside the recess, so that the protruding fixing member does not easily block the hole (liquid flow path).
In addition, even if the valve seat is deformed by crimping, since the hole serving as a flow path is inside the recess, it is difficult for the deformed valve seat to block the hole or shorten the diameter of the hole, and the valve seat The holes can be made less susceptible to deformation.

[Application Example 20] In the method for manufacturing a valve mechanism according to the above application example, the flow path resistance between the valve seat and the first surface is gradually reduced from the opening side toward the third surface side. It is preferable to include a step of providing a groove on the valve seat or the first surface.

When the flow path resistance between the valve seat and the first surface gradually decreases from the opening side toward the third surface side, the fixing member can easily flow toward the third surface side rather than the opening side. Therefore, in the portion (structure) where the valve seat, the fixing member, and the opening member are laminated, the fixing member closes the opening and the function of the valve mechanism is hindered (the valve mechanism may not operate normally). Can be suppressed.

Schematic plan view of an inkjet recorder. The schematic sectional view of the valve unit and the recording head which concerns on Embodiment 1. FIG. Schematic cross-sectional view of the head body. The schematic diagram of the main part of the valve unit when the ink flow path is closed. Schematic diagram of the main part of the valve unit when the ink flow path is opened. An enlarged view of the region A surrounded by the alternate long and short dash line in FIG. A process flow showing a method for manufacturing a valve unit according to the first embodiment. The schematic diagram which shows the state of the process shown in FIG. The schematic diagram which shows the state of the process shown in FIG. The schematic diagram which shows the state of the process shown in FIG. The schematic diagram which shows the state of the process shown in FIG. The schematic diagram which shows the state of the process shown in FIG. The schematic diagram which shows the state of the process shown in FIG. The schematic diagram which shows the state of the process shown in FIG. The schematic diagram which shows the state of the process shown in FIG. The schematic diagram which shows the outline of the valve unit which concerns on Embodiment 2. The schematic diagram which shows the outline of another valve unit which concerns on Embodiment 2. A process flow showing a method for manufacturing a valve unit according to the second embodiment. The schematic which shows the state of the process shown in FIG. The schematic which shows the state of the process shown in FIG. The schematic diagram which shows the valve opening state of the on-off valve which concerns on Embodiment 3. The schematic diagram which shows the closed state of the on-off valve which concerns on Embodiment 3. The schematic diagram which shows the arrangement state of the valve seat and the opening member in the valve unit which concerns on modification 1. FIG. The schematic diagram which shows the arrangement state of the valve seat and the opening member in the valve unit which concerns on modification 1. FIG. The schematic diagram which shows the arrangement state of the valve seat and the opening member in the valve unit which concerns on modification 1. FIG. The schematic diagram which shows the arrangement state of the valve seat and the opening member in the valve unit which concerns on modification 1. FIG. The schematic diagram which shows the arrangement state of the valve seat and the opening member in the valve unit which concerns on modification 1. FIG. The schematic plan view which shows the state of the opening member which concerns on modification 3. FIG. 6 is a cross-sectional view of the opening member along the line GG of FIG. The schematic plan view which shows the state of the opening member which concerns on modification 4.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Such an embodiment shows one aspect of the present invention, does not limit the present invention, and can be arbitrarily changed within the scope of the technical idea of the present invention. Further, in each of the following drawings, the scale of each layer and each part is different from the actual scale in order to make each layer and each part recognizable in the drawing.

(Embodiment 1)
<Overview of printer>
FIG. 1 is a schematic plan view of an inkjet recording device (hereinafter referred to as a printer).
As shown in FIG. 1, the printer 1 includes a substantially rectangular body frame 2. A medium support member 3 that supports a recording medium (not shown) extends in the main body frame 2 along the longitudinal direction (main scanning direction) of the main body frame 2. A recording medium such as paper is fed onto the medium support member 3 along the lateral direction (sub-scanning direction) of the main body frame 2 by a paper feeding mechanism (not shown). Further, above the medium support member 3 in the main body frame 2, a rod-shaped guide shaft 4 extending along the main scanning direction is erected.

In the following description, the main scanning direction is the X direction, the sub scanning direction is the Y direction, and the thickness direction of the printer 1 orthogonal to the X direction and the Y direction is the Z direction. Further, the tip end side of the arrow indicating the direction in the drawing is defined as the “(+) direction”, and the proximal end side is defined as the “(−) direction”.
The X direction is an example of the "relative movement direction". In the following description, viewing from the X direction, that is, "when viewed from the direction of relative movement" is referred to as plan view.

The carriage 5 is supported on the guide shaft 4 in a state where it can reciprocate in the X direction along the guide shaft 4. The carriage 5 is connected to a carriage motor 7 provided on the main body frame 2 via an endless timing belt 6 mounted between a pair of pulleys 6a provided on the main body frame 2. As a result, the carriage 5 is reciprocated along the guide shaft 4 by the drive of the carriage motor 7.

The carriage 5 is equipped with an inkjet recording head (hereinafter referred to as a recording head) 20 and a valve unit 50 according to the first embodiment.
The valve unit 50 is an example of a "valve mechanism".

Although details will be described later, in the printer 1, a plurality of nozzle openings 334 (see FIG. 2) are provided on the surfaces of the recording head 20 facing the medium support member 3, and are not shown in the recording head 20. By driving the pressure generating means, ink droplets are ejected from each nozzle opening 334 onto the recording medium supplied onto the medium support member 3, so that printing is performed on the recording medium.

A tank holder 9 is provided on the X (+) direction side of the main body frame 2, and a plurality of ink tanks 8 serving as liquid storage means are detachably attached to the tank holder 9. In this embodiment, two ink tanks 8 are provided. Ink tanks 8 are stored with inks of different types (colors).
Ink is an example of "liquid". Further, the number of ink tanks 8 is not limited to two, and may be more than two or less than two.

The ink contains a coloring material, a solvent that disperses (or dissolves) the coloring material, and the like. The coloring material is, for example, a dye or a pigment. The solvent is, for example, an aqueous medium, and pure water such as ion-exchanged water, ultrafiltration water, reverse osmosis water, and distilled water or ultrapure water can be used. That is, the ink is a water-based ink that uses an aqueous medium as a solvent.
The ink may be a non-aqueous ink using an organic solvent as a solvent.

Each ink tank 8 mounted on the tank holder 9 is connected to the valve unit 50 via a supply pipe 10 such as a tube. The ink of each color stored in each ink tank 8 is pressurized by a pressurizing pump (not shown), and is pressurized and supplied to the valve unit 50 via the supply pipe 10.

A maintenance unit 11 for performing maintenance processing such as cleaning of the valve unit 50 and the recording head 20 is provided in the home position region of the carriage 5 arranged on the X (+) direction side in the main body frame 2. The maintenance unit 11 has a cap 12 and a cap for contacting the recording head 20 so as to surround each nozzle opening 334 of the recording head 20 and receiving ink ejected by flushing from each nozzle opening 334. A suction pump (not shown) capable of sucking the inside of the 12 is provided.

Then, by sucking the inside of the cap 12 with a suction pump in a state where the cap 12 is in contact with the recording head 20 so as to surround each nozzle opening 334 of the recording head 20, ink, air bubbles, etc. thickened from each nozzle opening 334 are sucked. Is forcibly discharged into the cap 12.
That is, in the maintenance process, the thickened ink and air bubbles in the ink flow path of the valve unit 50 and the recording head 20 are forcibly discharged from the nozzle opening 334 to bring the valve unit 50 and the recording head 20 into a normal state. Recover.

<Overview of recording head>
FIG. 2 is a schematic cross-sectional view of the valve unit and the recording head according to the first embodiment. FIG. 3 is a schematic cross-sectional view of the head body.
Hereinafter, an outline of the recording head 20 will be described with reference to FIGS. 2 and 3.

As shown in FIGS. 2 and 3, the recording head 20 includes a head body 30 for ejecting ink droplets and a flow path member 40 for supplying ink to the head body 30.
The head body 30 includes an actuator unit 31, a case 32 capable of accommodating the actuator unit 31 inside, a flow path unit 33 fixed to one surface of the case 32, and a wiring board 34 fixed to the other surface of the case 32. And.

In the actuator unit 31, the piezoelectric actuator forming member 311 in which a plurality of piezoelectric actuators are arranged side by side along the parallel arrangement direction of the nozzle openings 334 and the tip end (one end) side of the piezoelectric actuator forming member 311 are free ends. It has a fixing plate 312 whose base end (other end) side is fixed as a fixing end.

The piezoelectric actuator forming member 311 is formed by alternately sandwiching and laminating the piezoelectric material 313, the electrode forming material 314, and the electrode forming material 315. A plurality of slits are formed in the piezoelectric actuator forming member 311 by, for example, a wire saw or the like, and the tip end side thereof is cut into a comb-teeth shape so that the piezoelectric actuators are arranged side by side.

Here, the region fixed to the fixing plate 312 of the piezoelectric actuator forming member 311 is an inert region that does not contribute to vibration, and is between the electrode forming material 314 and the electrode forming material 315 constituting the piezoelectric actuator forming member 311. When a voltage is applied, only the region on the tip end side that is not fixed to the fixing plate 312 vibrates. The tip surface of the piezoelectric actuator forming member 311 is fixed to the diaphragm 331.

Further, each piezoelectric actuator of the actuator unit 31 is connected to a circuit board 318 such as a COF on which a drive circuit 317 such as a drive IC for driving the piezoelectric actuator is mounted.

The flow path unit 33 includes a flow path forming substrate 330, a diaphragm 331, and a nozzle plate 332.
A plurality of pressure generating chambers 333 are arranged side by side in the flow path forming substrate 330, and both sides of the flow path forming substrate 330 are a nozzle plate 332 having a nozzle opening 334 corresponding to each pressure generating chamber 333 and a diaphragm 331. It is sealed by. The flow path forming substrate 330 is formed with a manifold 336 that is communicated with each pressure generating chamber 333 via an ink supply path 335 and serves as a common ink chamber of a plurality of pressure generating chambers 333 for each row.

The tip of the piezoelectric actuator forming member 311 is fixed to each region of the diaphragm 331 facing each pressure generating chamber 333.
Further, a compliance unit 337 is provided in a region corresponding to the manifold 336 of the diaphragm 331. When a pressure change occurs in the manifold 336, the compliance unit 337 absorbs the pressure change by deforming the compliance unit 337, and plays a role of always keeping the pressure in the manifold 336 constant.

The case 32 is provided with an ink introduction path 321 that supplies ink from the valve unit 50 to the manifold 336. In this embodiment, a total of two ink introduction paths 321 are provided, one for each of the manifolds 336. Then, the ink supplied from the ink tank 8 to the ink introduction path 321 via the valve unit 50 is supplied to the manifold 336 and distributed to each pressure generation chamber 333 via the ink supply path 335.

Further, the case 32 is provided with a housing portion 322 corresponding to the row of the pressure generating chamber 333. In the present embodiment, two accommodating portions 322 are provided, and the actuator unit 31 is fixed in each accommodating portion 322.

Further, a wiring board 34 is provided on the side of the case 32 opposite to the flow path unit 33, and the other end of the circuit board 318 to which one end is connected to the actuator unit 31 is connected to the wiring board 34. ..

In such a head body 30, the volume of each pressure generating chamber 333 is changed by the deformation of the piezoelectric actuator forming member 311 (piezoelectric actuator) and the diaphragm 331, and ink droplets are ejected from a predetermined nozzle opening 334. There is.

As shown in FIG. 2, the valve unit 50 is fixed to one surface of the flow path member 40, and the head body 30 is fixed to the other surface. The ink from the valve unit 50 is supplied to the head body 30 via the flow path member 40.

Specifically, the flow path member 40 is provided with an ink communication passage 41. On one side of the opening of the ink passage 41, a filter 42 for removing foreign matter such as dust and air bubbles contained in the ink and a supply needle 43 provided on the filter 42 are provided. The supply needle 43 is inserted into the valve unit 50, and the ink from the valve unit 50 passes through the inside of the supply needle 43, the foreign matter is removed by the filter 42, and then the ink is supplied to the head body 30 via the ink communication passage 41. Will be done.

<Overview of valve unit>
FIG. 4 is a schematic view of a main part of the valve unit when the ink flow path is closed. FIG. 5 is a schematic view of a main part of the valve unit when the ink flow path is opened. FIG. 6 is an enlarged view of the region A surrounded by the alternate long and short dash line of FIG.
In FIG. 6, in order to make the configuration of the invention easy to understand, the valve seat 60, the opening member 70, and the adhesive 81 are shown, and the valve seat 60 is shown in a rectangular shape for convenience.
Next, an outline of the valve unit 50 will be described with reference to FIGS. 4 to 6.

The valve unit 50 is an on-off valve provided in the middle of the ink flow path and opens and closes the ink flow path.
As shown in FIGS. 4 and 5, in the valve unit 50, the lid member 51, the valve seat 60, and the film member 53 are arranged in order along the X direction. The lid member 51 and the film member 53 are circular members in a plan view.
The valve body 54 or the valve seat 60 is an example of “one” or “the other”.

The lid member 51 and the valve seat 60 are members formed by, for example, molding a thermoplastic resin. The lid member 51 is adhered to the valve seat 60 by, for example, heat welding. The film member 53 is made of a flexible resin film and is deformable, and is adhered to the valve seat 60 by, for example, heat welding.

The valve seat 60 has a first concave portion (empty portion) 61 on the side of the lid member 51 and a second concave portion (empty portion) 62 on the side of the film member 53. The first recess 61 and the second recess 62 are partitioned by a partition wall 63, and both are circular in a plan view. The opening of the first recess 61 is sealed by the lid member 51, and the first recess 61 becomes the liquid chamber 67. The opening of the second recess 62 is sealed by the film member 53, and the second recess 62 becomes the pressure adjusting chamber 68.

The partition wall 63 has a convex portion 64 on the side of the first concave portion 61. The convex portion 64 is circular in a plan view and is arranged at the center of the first concave portion 61. A hole 65 penetrating the partition wall 63 is formed in the center of the convex portion 64. The hole 65 serves as an ink flow path that communicates the liquid chamber 67 and the pressure adjusting chamber 68.
That is, the valve seat 60 has a hole 65 that serves as an ink flow path.

The liquid chamber 67 communicates with the ink tank 8 via an inflow passage 515, a supply pipe 10, and the like. The pressure adjusting chamber 68 is communicated with the ink passage 41 of the flow path member 40 via the outflow passage 517. The ink stored in the ink tank 8 is supplied to the recording head 20 via the supply pipe 10, the inflow path 515, the liquid chamber 67, the hole 65, the pressure adjusting chamber 68, and the outflow path 517. Will be done.

A spring 52, a valve body 54, an opening member 70, and a pressure receiving plate 59 are arranged in this order between the lid member 51 and the film member 53.
One end of the spring 52 is fixed to the lid member 51, and the other end of the spring 52 is fixed to the valve body 54.

The valve body 54 is composed of a main body portion 55 and a seal portion 58.
The main body portion 55 is composed of a shaft portion 56 and a flange portion 57 that is thicker than the shaft portion 56. The shaft portion 56 is a cylindrical member elongated in the X direction, penetrates through the hole 65, and is arranged so as to straddle the liquid chamber 67 and the pressure adjusting chamber 68. The flange portion 57 is a circular member in a plan view and is arranged in the liquid chamber 67. The seal portion 58 is made of an elastic member made of, for example, elastomer or rubber, and is fixed to the surface of the flange portion 57 facing the opening member 70.
In the present embodiment, the shaft portion 56 and the flange portion 57 are integrated, but the shaft portion 56 and the flange portion 57 may be separated from each other. Further, the shaft portion 56 and the pressure receiving plate 59 described later may be integrated.

The end of the shaft portion 56 is arranged so as to be in contact with the pressure receiving plate 59. The pressure receiving plate 59 is made of a material that is harder than the film member 53, and is fixed near the center of the film member 53. The pressure receiving plate 59 has a role of appropriately urging the valve body 54 with a force due to the displacement of the film member 53.

The opening member 70 is made of, for example, SUS (stainless steel), is a circular member in a plan view, and is arranged inside the convex portion 64. The opening member 70 is preferably made of a material that does not easily swell with ink. As the material constituting the opening member 70, for example, a resin material, a metal material, glass, ceramic, a silicon single crystal substrate, or the like can be used in addition to SUS. The opening member 70 is fixed to the valve seat 60 by the adhesive 81. An opening 79 penetrating the opening member 70 is formed in the center of the opening member 70. The shaft portion 56 of the valve body 54 described above is also penetrated through the opening 79. That is, the shaft portion 56 of the valve body 54 is penetrated through the hole 65 of the valve seat 60 and the opening 79 of the opening member 70. Therefore, the opening 79 of the opening member 70 also serves as an ink flow path for communicating the liquid chamber 67 and the pressure adjusting chamber 68.
The adhesive 81 is an example of a “fixing member”. The details of the opening member 70 will be described later.

In the valve unit 50, the position of the valve body 54 changes due to the displacement of the film member 53, and the seal portion 58 of the valve body 54 separates and contacts the opening member 70.
Specifically, the valve body 54 has a force caused by a pressure difference between the pressure of the ink in the liquid chamber 67 and the pressure of the ink in the pressure adjusting chamber 68, a force urged by the pressure receiving plate 59 and the spring 52, and the like. Works. By these forces, the position of the valve body 54 is controlled, the valve body 54 reciprocates in the X direction, and the seal portion 58 of the valve body 54 comes into contact with the opening member 70.

When ink is not consumed, such as when the recording medium is not printed and the ink is not consumed, the seal portion 58 of the valve body 54 comes into contact with the opening member 70, the opening 79 is closed, and the liquid chamber 67 The ink flow path to and from the pressure adjustment chamber 68 is closed.

On the other hand, when ink is consumed by printing on a recording medium or maintenance processing, if the ink in the pressure adjusting chamber 68 decreases due to the consumption of the ink, the pressure acting on the ink in the pressure adjusting chamber 68 decreases. , The film member 53 is displaced from the pressure adjusting chamber 68 toward the liquid chamber 67 (X (−) direction), and the pressure receiving plate 59 fixed to the film member 53 presses the main body 55 of the valve body 54. Then, as shown in FIG. 5, the seal portion 58 of the valve body 54 is separated from the opening member 70, and the ink flow path between the liquid chamber 67 and the pressure adjusting chamber 68 is opened.
In this way, in the valve unit 50, the valve body 54 reciprocates in the X direction, and the seal portion 58 of the valve body 54 separates and contacts the opening member 70, so that the liquid chamber 67 and the pressure adjusting chamber 68 are separated from each other. The ink flow path is opened and closed. In other words, the valve body 54 opens and closes the ink flow path by relative movement with the valve seat 60.

When the ink is not consumed, such as in a non-printing state, the ink flow path in the bulb unit 50 is closed, so that the ink supplied under pressure from the ink tank 8 on the upstream side of the bulb unit 50 is the bulb unit. It is not supplied to the recording head 20 on the downstream side of 50.

On the other hand, when the ink in the printing state or the maintenance process is consumed, the ink in the pressure adjusting chamber 68 gradually decreases. As the amount of ink in the pressure adjusting chamber 68 decreases, the pressure decreases and the pressure adjusting chamber becomes a negative pressure. As a result, the film member 53 is displaced in the direction in which the ink flow path is opened, and ink is supplied from the liquid chamber 67 to the pressure adjusting chamber 68. In this way, the ink pressurized and supplied from the ink tank 8 is supplied to the recording head 20 on the downstream side of the valve unit 50. When the negative pressure in the pressure adjusting chamber 68 is eliminated by the inflow of ink into the pressure adjusting chamber 68 of the valve unit 50, the ink flow path is closed and the ink is supplied to the recording head 20. It will be stopped.

During the printing operation, the valve body 54 is slightly opened as the ink is consumed, and the ink is sequentially supplied to the pressure adjusting chamber 68. Further, the pressure fluctuation of the ink in the liquid chamber 67 on the upstream side is restricted to be within a certain range by opening and closing the valve body 54, and is separated from the pressure change of the ink in the pressure adjusting chamber 68 on the downstream side. Is done. Therefore, even if the pressure changes occur on the upstream side of the ink flow path with respect to the valve body 54, the downstream side of the ink flow path is not affected by the pressure change. Therefore, the pressure acting on the ink in the pressure adjusting chamber 68 of the valve unit 50 is controlled within a certain range, and the flow pressure of the ink supplied to the recording head 20 is adjusted within an appropriate range.
In other words, the valve unit 50 is a valve mechanism having a pressure adjusting function for controlling the flow pressure of the ink supplied to the recording head 20 within an appropriate range.

As shown in FIG. 6, the opening member 70 is disposed so as to face the first surface 71 fixed to the valve seat 60 by the adhesive 81 and the first surface 71, and is separated from and abutted against the seal portion 58 of the valve body 54. It has a second surface 72, a third surface 73 that intersects the first surface 71 and the second surface 72 and is arranged on the outer edge of the opening member 70, and a fourth surface 74 that is arranged so as to face the third surface 73. ing. Further, the area surrounded by the fourth surface 74 is the opening 79, and the edge of the opening 79 is arranged on the fourth surface 74.
The opening 79 penetrates the first surface 71 and the second surface 72, and the valve body 54 is penetrated. Further, a part of the second surface 72 (the outer peripheral surface 72B and the second inclined surface 72C, which will be described later) is covered with a water repellent film 77, which is an example of the “liquid repellent film”.
In this way, the opening member 70 intersects the first surface 71 fixed to the valve seat 60, the second surface 72 separated from the valve body 54, and the first surface 71 and the second surface 72. It has three surfaces 73 and an opening 79 through which the valve body 54 penetrates through the first surface 71 and the second surface 72.

The opening member 70 has a burr 75 bent in the direction from the second surface 72 toward the first surface 71 on the side of the fourth surface 74 (the edge of the opening 79). The tip 75T of the burr 75 bites into the valve seat 60. By letting the tip 75T of the burr 75 bite into the valve seat 60, the tip 75T of the burr 75 acts as a kind of anchor bolt, and compared with the case where the tip 75T of the burr 75 does not bite into the valve seat 60. Therefore, the opening member 70 is strongly fixed to the valve seat 60, and for example, even if a force in the Z direction acts on the opening member 70, the position of the opening member 70 with respect to the valve seat 60 is less likely to change.
Further, the opening member 70 has a burr 76 bent in the direction from the first surface 71 to the second surface 72 on the side of the third surface 73 (outer edge of the opening member 70). The burr may be burrs.

When the burrs 75 and 76 are provided on the opening member 70, the second surface 72 of the opening member 70 has curved portions (first inclined surface 72A, second inclined surface 72C).
That is, when the burr 75 bent in the direction from the second surface 72 to the first surface 71 is formed on the edge of the opening 79, the distance D2 between the valve seat 60 and the valve seat 60 becomes longer in the direction from the opening 79 to the third surface 73. The first inclined surface 72A is formed near the opening 79.
When the burr 76 bent in the direction from the first surface 71 to the second surface 72 is formed on the outer edge of the opening member 70, the distance D2 between the valve seat 60 and the valve seat 60 becomes longer in the direction from the opening 79 to the third surface 73. The second inclined surface 72C is formed near the third surface 73. Then, an outer peripheral surface 72B having a substantially constant distance D2 between the valve seat 60 is formed between the first inclined surface 72A and the second inclined surface 72C.
The first inclined surface 72A is an example of an “inclined surface”. The distance D2 between the valve seat 60 and the valve seat 60 is an example of the "distance between the valve seat 60".

By providing the burrs 75 and 76 in the opening member 70 in this way, the second surface 72 is arranged in order from the fourth surface 74 (opening 79) toward the third surface 73, and the first inclined surface 72A And the outer peripheral surface 72B and the second inclined surface 72C.
That is, the second surface 72 is provided with a first inclined surface 72A that lengthens the distance D2 between the valve seat 60 and the valve seat 60 in the direction from the opening 79 toward the third surface 73, closer to the opening 79 than the third surface 73. Further, it has an outer peripheral surface 72B arranged on the side of the third surface 73 with respect to the first inclined surface 72A.
Since the first inclined surface 72A is provided closer to the opening 79 than the third surface 73, the ink is guided toward the opening 79 by the first inclined surface 72A and easily flows to the side of the opening 79.
Then, the seal portion 58 of the valve body 54 comes into contact with the outer peripheral surface 72B. That is, the outer peripheral surface 72B is a surface on which the valve body 54 comes into contact with each other.

The first inclined surface 72A is not covered with the water repellent film 77, and the outer peripheral surface 72B is covered with the water repellent film 77. The second inclined surface 72C may or may not be covered with the water-repellent film 77. As a result, the first inclined surface 72A arranged closer to the opening 79 than the outer peripheral surface 72B has lower water repellency (liquid repellency) and higher hydrophilicity than the outer peripheral surface 72B. That is, the first inclined surface 72A near the ink flow path (opening 79) is highly hydrophilic. On the other hand, the outer peripheral surface 72B has higher water repellency (liquid repellency) than the first inclined surface 72A. That is, the outer peripheral surface 72B with which the seal portion 58 of the valve body 54 comes into contact with each other has higher water repellency (liquid repellency) than the first inclined surface 72A.
The water-repellent film 77 may be any one having liquid repellency against ink, and for example, a metal film containing a fluoropolymer, a molecular film of a metal alkoxide having liquid repellency, or the like can be used.

As described above, in the printer 1, the air bubbles generated in the ink flow path of the valve unit 50 and the recording head 20 are forcibly discharged from the nozzle opening 334 by the maintenance process, and the valve unit 50 and the recording head 20 are normal. It is recovering to the state.
Bubbles generated in the ink flow path are less likely to adhere to the surface with low water repellency (the surface with high hydrophilicity) than the surface with high water repellency, so that they are closer to the ink flow path and the shaft portion of the valve body 54. Increasing the hydrophilicity of the first inclined surface 72A closest to 56 makes it difficult for air bubbles to stay on the first inclined surface 72A. That is, if the water repellency of the first inclined surface 72A is high, air bubbles are likely to be trapped between the first inclined surface 72A and the valve body 54. On the other hand, by increasing the hydrophilicity of the first inclined surface 72A, the air bubbles in the ink flow path of the valve unit 50 are easily discharged from the opening 79 by the maintenance process. That is, if the hydrophilicity of the first inclined surface 72A close to the ink flow path is increased, air bubbles in the ink flow path are easily discharged from the valve unit 50, and the air exhaustability of the valve unit 50 can be improved.

When the water-repellent film 77 enhances the water repellency of the outer peripheral surface 72B to which the seal portion 58 of the valve body 54 comes into contact with each other, the outer peripheral surface 72B repels ink, and the ink constituents are less likely to accumulate on the outer peripheral surface 72B. Become. If the ink constituents are deposited on the outer peripheral surface 72B, even if the seal portion 58 of the valve body 54 comes into contact with the outer peripheral surface 72B, it becomes difficult for the deposited ink constituents to close the opening 79. Occurs. If it is difficult for ink to accumulate on the outer peripheral surface 72B, such a problem is less likely to occur. Therefore, by separating and contacting the seal portion 58 of the valve body 54 with the outer peripheral surface 72B, the liquid chamber 67 and the pressure adjusting chamber 68 are brought into contact with each other. The ink flow path (opening 79) between them is properly opened and closed, and the valve unit 50 as a valve mechanism operates stably and normally.

Further, when the burrs 75 and 76 are provided on the opening member 70, the first surface 71 of the opening member 70 has a curved portion similar to the second surface 72 of the opening member 70. That is, the first surface 71 of the opening member 70 has a distance D1 between the valve seat 60 and the first surface 71 in the direction from the opening 79 toward the third surface 73, similarly to the second surface 72 of the opening member 70. The elongated inclined surface is formed near the opening 79 (fourth surface 74) and near the third surface 73.
The interval D1 is an example of "the interval between one side and the first surface".

As a result, the valve unit 50 has two inclined portions 45 (first inclined portion 46, which lengthen the distance D1 between the valve seat 60 and the first surface 71 in the direction from the opening 79 toward the third surface 73. The second inclined portion 47) is formed. Further, the first inclined portion 46 (the portion surrounded by the broken line in the figure) is arranged closer to the opening 79 than the third surface 73, and the second inclined portion 47 (the portion surrounded by the broken line in the figure). Is located closer to the third surface 73 than the opening 79.
That is, by providing the burrs 75 and 76 in the opening member 70, the valve unit 50 increases the distance D1 between the valve seat 60 and the first surface 71 in the direction from the opening 79 toward the third surface 73. It will have two inclined portions 45 (first inclined portion 46, second inclined portion 47). It is not necessary to make the heights of the burrs 75 and 76 uniform, but it is preferable that the burrs 75 are functionally higher than the burrs 76.

Although the details will be described later, the adhesive 81 arranged between the valve seat 60 and the opening member 70 becomes easy to flow in the direction from the opening 79 toward the third surface 73 due to the inclined portions 46 and 47, and the third It becomes difficult to flow in the direction from the surface 73 toward the opening 79. As a result, the adhesive 81 is less likely to protrude inside the opening 79. That is, for example, the adhesive 81 protrudes inside the opening 79, the adhesive 81 closes the opening 79, or the adhesive 81 contacts (interferes with) the valve body 54, and the adhesive 81 hinders the movement of the valve body 54. It is less likely that problems such as being done will occur.

<Manufacturing method of valve unit>
FIG. 7 is a process flow showing a manufacturing method of the valve unit according to the present embodiment. 8, 9A to 9F, and 10 are schematic views showing the state of the process shown in FIG. 7.
Note that FIG. 8 is a schematic view showing a state of the mother substrate 70M in which a plurality of opening members 70 are formed, and the opening members 70 formed in the subsequent steps are shown by broken lines. 9A to 9F are views corresponding to FIG. FIG. 10 is a diagram corresponding to FIG.
Further, FIG. 8 is a view of the mother substrate 70M on which a plurality of opening members 70 are formed as viewed from the X direction. 9A to 9F and 10 are views of the opening member 70 or the valve seat 60 viewed from a direction (Y direction) intersecting the X direction.
Hereinafter, the outline of the manufacturing method of the valve unit 50 according to the present embodiment will be described with reference to FIGS. 7, 8, 9A to 9F, and FIG. 10.

As shown in FIG. 7, the method for manufacturing the valve unit 50 according to the present embodiment includes a step of forming a water-repellent film 77 on the mother substrate 70M (step S1) and a step of punching the mother substrate 70M to form an opening 79. (Step S2), a step of punching out the mother substrate 70M to form an opening member 70 (step S3), a step of molding a resin to prepare a valve seat 60 (step S11), and a step of arranging the adhesive 81 (step S11). Step S12), a step of bonding the valve seat 60 and the opening member 70 (step S21), a step of crimping the valve seat 60 and the opening member 70 (step S22), and a step of curing the adhesive 81 (step S12). S23) and is included.

Note that step S1 is an example of "a step of forming a liquid repellent film on the second surface". Step S3 is an example of the “step of forming an opening”. Step S12 is an example of the “step of arranging the fixing member”. Step S22 is an example of the “step of moving the fixing member”. Step S23 is an example of the “step of curing the fixing member”. Further, the order of step S1, step S2, and step S3 may be changed.

As shown in FIG. 8, in step S1, the water repellent film 77 is formed on the surface 72M of the mother substrate 70M made of SUS, that is, the surface 72M which becomes the second surface 72 of the opening member 70 in step S3 described later. ..
The water-repellent film 77 can be formed by providing a metal film containing a fluorine-based polymer on the surface 72M of the mother substrate 70M, for example, by eutectoid plating. Further, the water-repellent film 77 can also be formed by mixing a silane coupling agent such as alkoxylan with a solvent such as thinner to form a metal alkoxide solution, and applying the metal alkoxide solution to the surface 72M of the mother substrate 70M. Can be formed.

As shown in FIG. 9A, in step S2, the mother substrate 70M is punched from the X (+) direction to the X (−) direction (direction of the arrow in the figure) by press working with a die (not shown). The opening 79 is formed. That is, using a mold, the mother substrate 70M is punched out from the surface 72M on which the water-repellent film 77 is formed toward the surface opposite to the surface 72M on which the water-repellent film 77 is formed to form an opening 79. To do. In step S3, which will be described later, the surface 72M on which the water-repellent film 77 is formed becomes the second surface 72 of the opening member 70, and the surface opposite to the surface 72M on which the water-repellent film 77 is formed is the second surface 72 of the opening member 70. It becomes 71 on one side.

In step S2, the direction in which the mother substrate 70M is punched out, that is, the surface 72M on which the water-repellent film 77 is formed (second surface 72) is opposite to the surface 72M on which the water-repellent film 77 is formed (first surface 71). A burr 75 bent in the direction toward is formed at the edge of the opening 79. Then, in step S3 described later, the surface 72M on which the water-repellent film 77 of the burr 75 is formed becomes the first inclined surface 72A of the second surface 72, which is opposite to the surface 72M on which the water-repellent film 77 of the burr 75 is formed. The side surface becomes the first inclined surface 72A1 of the first surface 71. Further, since the mold comes into shear contact with the first inclined surface 72A of the second surface 72 during press working, the water-repellent film 77 provided on the first inclined surface 72A of the second surface 72 is substantially present. It is scraped off.

As shown in FIG. 9B, in step S3, the mother substrate 70M shown by the broken line in the figure is moved from the X (+) direction to the X (−) direction (in the figure) by press working with a die (not shown). The opening member 70 is formed by punching in the direction of the arrow indicated by the broken line. That is, using a mold, the mother substrate 70M is punched out from the surface 72M on which the water-repellent film 77 is formed toward the surface opposite to the surface 72M on which the water-repellent film 77 is formed, and the opening member 70 is formed. Form.

On the mother substrate 70M shown by the broken line in the figure, the direction (X (+) direction) from the surface 72M on which the water-repellent film 77 is formed to the surface opposite to the surface 72M on which the water-repellent film 77 is formed. A bent burr is formed, and a burrs bent in the X (−) direction corresponding to the burr are formed on the outer edge of the opening member 70. Then, the burrs become burrs 76 that are bent in the direction from the first surface 71 to the second surface 72.
Then, the second surface 72 of the burr 76 becomes the second inclined surface 72C, and the first surface 71 of the burr 76 becomes the second inclined surface 72A2. Further, on the second surface 72, an outer peripheral surface 72B covered with a water-repellent film 77 that is not affected by press working by the mold is formed between the first inclined surface 72A and the second inclined surface 72C. That is, an outer peripheral surface 72B that is arranged between the first inclined surface 72A and the second inclined surface 72C and is parallel to the Y direction and the Z direction is formed. As a result, the second surface 72 includes a first inclined surface 72A in which the water-repellent film 77 is substantially scraped off to reduce water repellency, and an outer peripheral surface 72B covered with the water-repellent film 77 to increase water repellency. Is formed. It is not necessary that the portion where the water-repellent film 77 is substantially scraped off and the first inclined surface 72A do not completely coincide with each other.

As shown in FIG. 9C, in step S11, the thermoplastic resin is molded using a plurality of molds (not shown), and the first concave portion 61, the second concave portion 62, the convex portion 64, and the hole 65 are formed. , A valve seat 60 having an outflow path 517 is prepared (formed). As the thermoplastic resin, a polyolefin resin, a polystyrene resin, a polyacrylic resin, an ABS resin, a vinyl chloride resin, a polycarbonate resin, or a polymer alloy containing at least one of them as a constituent component can be used.

As shown in FIG. 9D, in step S12, the adhesive 81 is placed on the convex portion 64 of the valve seat 60. The adhesive 81 is, for example, a thermoplastic adhesive (a solid adhesive composed of a thermoplastic resin). In step S12, the adhesive 81 may be placed on the convex portion 64 of the valve seat 60 by applying the adhesive 81 having fluidity using, for example, a dispenser.

As shown in FIG. 9E, in step S21, the opening member 70 is arranged inside the convex portion 64 of the valve seat 60 in a plan view, and the hole 65 is arranged inside the opening 79 in a plan view. The valve seat 60 and the opening member 70 are bonded together using a device (not shown).

In the bonding device, a step on the side surface 64A forming the outer peripheral surface of the convex portion 64 is detected by image recognition. That is, the convex portion 64 serves as an alignment mark for bonding the valve seat 60 and the opening member 70 at a predetermined position. The bonding device correctly recognizes the position of the valve seat 60 by the convex portion 64, the opening member 70 is correctly arranged inside the convex portion 64 of the valve seat 60 in a plan view, and the hole 65 is inside the opening 79 in a plan view. The opening member 70 can be attached to the valve seat 60 so that it is correctly arranged in the valve seat 60.
That is, by providing the convex portion 64 as an alignment mark that correctly recognizes the position of the valve seat 60, the opening member 70 can be aligned with the valve seat 60 with high accuracy.

As shown in FIG. 9F, in step S22, the valve seat 60 and the opening member 70 are crimped and heated by using the heat tool 250, and the adhesive 81 arranged between the valve seat 60 and the opening member 70 is pressed. Make it flow.
The heat tool 250 has a holder 251 and a heating element 252 that generates heat when energized. The holder 251 is made of a material that supports the heating element 252 and easily conducts heat. In step S22, in a state where the heating element 252 generates heat (a state in which the heat tool 250 is heated), the heat tool 250 presses the opening member 70, narrows the distance D1 between the valve seat 60 and the opening member 70, and valves. The adhesive 81 arranged between the seat 60 and the opening member 70 is made to flow, and the valve seat 60 and the opening member 70 are crimped.

That is, in step S22, by crimping the valve seat 60 and the opening member 70 with the heat tool 250, the direction is from the second surface 72 formed on the edge of the opening 79 to the first surface 71 in step S3. The tip 75T of the bent burr 75 is made to bite into the valve seat 60.
By letting the tip 75T of the burr 75 bite into the valve seat 60, the tip 75T of the burr 75 acts as a kind of anchor bolt, and the valve seat is compared with the case where the tip 75T of the burr 75 is not bitten into the valve seat 60. The position of the opening member 70 with respect to 60 can be made difficult to change.

In FIG. 10, the flow state of the adhesive 81 is schematically shown when the heat tool 250 presses the opening member 70 in step S22.
As shown in FIG. 10, on the first surface 71, a first inclined surface 71A1 bent in a direction from the second surface 72 to the first surface 71 is formed by the burr 75, and the first surface 71 to the first surface 71 is formed by the burr 76. A second inclined surface 71A2 bent in the direction toward the two surfaces 72 is formed.

The heat tool 250 heats the adhesive 81 to make it fluid.
The heat tool 250 presses the opening member 70, narrows the distance D1 between the valve seat 60 and the first surface 71, and presses the adhesive 81 arranged between the valve seat 60 and the first surface 71. To do. At this time, the force FA in the direction orthogonal to the first inclined surface 71A1 acts on the adhesive 81 from the first inclined surface 71A1, and the force FC in the direction orthogonal to the second inclined surface 71A2 is the second. 2 Acts from the inclined surface 71A2. That is, the forces FA and FC in the directions orthogonal to the inclined surfaces 71A1 and 71A2 act on the adhesive 81 from the inclined surfaces 71A1 and 71A2. Further, the forces FA and FC acting on the adhesive 81 are the component forces FAX and FCx in the direction (X direction) from the second surface 72 to the first surface 71, and the opening 79 (fourth surface 74) to the third surface. It is decomposed into component forces Faz and FCz in the direction toward 73 (Z direction).

When the component forces FAX and FCx act on the adhesive 81, the adhesive 81 flows in the direction of becoming thinner. When the component forces Faz and FCz act on the adhesive 81, the adhesive 81 flows in the direction from the opening 79 toward the third surface 73.
On the first inclined surface 71A1, the adhesive 81 flows in the direction from the opening 79 toward the third surface 73 due to the component force Faz, so that the adhesive 81 is less likely to protrude to the side of the opening 79. On the second inclined surface 71A2, the adhesive 81 flows in the direction from the opening 79 toward the third surface 73 due to the component force FCz, so that the adhesive 81 protrudes from the second inclined surface 71A2.
That is, the component forces FAz and FCz regulate the flow direction of the adhesive 81 so that the adhesive 81 does not flow toward the opening 79. As a result, the amount of movement of the adhesive 81 due to crimping (that is, the amount of movement from the position where the adhesive 81 is arranged in step S12 to the position of the adhesive 81 when crimping is completed through step 22) The adhesive 81 is moved so as to be more toward the third surface 73 side than the opening 79 side.
As described above, in step S22, the distance D1 between the valve seat 60 and the first surface 71 (opening member 70) is narrowed, and the amount of movement of the adhesive 81 is closer to the third surface 73 side than the opening 79 side. This is a step of moving the adhesive 81 so that the amount of adhesive 81 increases.

In step S23, the heat tool 250 is used to heat the adhesive 81 crimped between the valve seat 60 and the opening member 70 to cure the adhesive 81. If the adhesive 81 is a thermoplastic adhesive, this step stops the heating of the heat tool and cools it.

In other words, in the manufacturing method according to the present embodiment, the burr 75 is formed as the inclined portions 46, 47 that lengthen the interval D1 between the first surface 71 and the valve seat 60 in the direction from the opening 79 toward the third surface 73. , 76, the first inclined surface 71A1 and the second inclined surface 71A2 were used. By these inclined surfaces 71A1 and 71A2, the component forces FAz and FCz in the direction from the opening 79 toward the third surface 73 act on the adhesive 81, and the adhesive 81 acts in the direction from the opening 79 toward the third surface 73. The flow direction of the adhesive 81 is regulated so that it flows. By doing so, the adhesive 81 protrudes inside the opening 79, and the adhesive 81 closes the opening 79 or comes into contact with (interferes with) the valve body 54 and hinders the movement of the valve body 54. It is possible to suppress the problem of such a problem.
Therefore, in the valve unit 50 manufactured by the manufacturing method according to the present embodiment, since the valve body 54 operates normally, the ink flow path between the liquid chamber 67 and the pressure adjusting chamber 68 is properly opened and closed. It will be stable and operate normally.
In the present embodiment, the first inclined surfaces 71A1 and the second inclined surfaces 71A2 of the burrs 75 and 76 during press working of the opening member 70 are used as the inclined portions 46 and 47, but the present invention is not limited to this. Regardless of the method of manufacturing the opening member 70, at least one of the inclined portions 46, 47 having a shape for increasing the distance between the valve seat 60 and the first surface 71 may be provided on the opening member 70. Further, in the present embodiment, the first inclined surface 72A is formed by the burrs 75 during press working of the opening member 70, but the present invention is not limited to this. Details will be described later.

(Embodiment 2)
FIG. 11 is a diagram corresponding to FIG. 4, and is a schematic diagram showing an outline of the valve unit according to the second embodiment. FIG. 12 is a diagram corresponding to FIG. 11, and is a schematic diagram showing an outline of another valve unit according to the second embodiment.
In the valve unit 50A according to the present embodiment, the valve seat 600 is formed with a recess 91, and the valve seat 600 is not formed with an inclined portion 45, a first inclined surface 72A, or a second inclined surface 72C. This is a main difference from the valve unit 50 according to the first embodiment.
Hereinafter, the valve unit 50A according to the present embodiment will be described with reference to FIG. 11, focusing on the differences from the first embodiment. Further, the same components as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted. The valve unit 50A is also an example of the "valve mechanism".

As shown in FIG. 11, in the valve seat 600, a concave portion 91 is formed inside the convex portion 64 and a hole 65 is formed inside the concave portion 91 in a plan view. In a plan view, the opening member 70 is arranged inside the convex portion 64. In a plan view, the opening 79 of the opening member 70 is arranged inside the recess 91 of the valve seat 600, and the hole 65 of the valve seat 600 is arranged inside the opening 79 of the opening member 70.
In a plan view, when the opening 79 of the opening member 70 is arranged inside the recess 91 of the valve seat 600, the fourth surface 74 (edge of the opening 79) of the opening member 70 is from the inner peripheral surface 91A of the recess 91. It is in a state of protruding outward.

An adhesive 81 is arranged between the valve seat 600 and the opening member 70, the recess 91 is arranged closer to the adhesive 81 than the hole 65, and the hole 65 is arranged farther from the adhesive 81 than the recess 91. ing. That is, the hole 65 is arranged so as to be farther from the adhesive 81 by providing the recess 91 as compared with the configuration in which the recess 91 is not provided (the configuration of the first embodiment). In other words, the hole 65 is arranged so as to be away from the surface of the valve seat 600 in contact with the adhesive 81.

The recess 91 and the hole 65 are circular in a plan view, and the diameter of the recess 91 is longer than the diameter of the hole 65 in a plan view. Further, the inner peripheral surface 91A of the concave portion 91 is curved (overhanging) in the direction approaching the valve body 54, and the side surface 64A of the convex portion 64 is curved (overhanging) in the direction away from the valve body 54. There is).

As described above, the valve unit 50A according to the present embodiment moves relative to the valve seat 600 having the recess 91 and the hole 65 provided inside the recess 91 and serving as an ink flow path. It includes a valve body 54 that opens and closes the ink flow path, an opening member 70 that is fixed to the valve seat 600 and has an opening 79, and an adhesive 81 that fixes the valve seat 600 and the opening member 70.

Further, in the valve unit 50A according to the present embodiment, similarly to the valve unit 50 of the first embodiment, the outer peripheral surface 72B to which the seal portion 58 of the valve body 54 comes into contact with each other is covered with the water repellent film 77 (FIG. 6). reference).

Since the hole 65 is arranged so as to be away from the surface of the valve seat 600 in contact with the adhesive 81, when the adhesive 81 flows into the recess 91 from the surface of the valve seat 600 in contact with the adhesive 81, the recess 91 Becomes a saucer for the fluidized adhesive 81, and it is difficult for the fluidized adhesive 81 to reach the holes 65. Therefore, the fluidized adhesive 81 is unlikely to come into contact with the valve body 54 penetrating the hole 65, and the problem that the movement of the valve body 54 is hindered is suppressed.

Further, by increasing the water repellency of the outer peripheral surface 72B to which the seal portion 58 of the opening member 70 comes into contact with each other and making it difficult for the ink constituents to be deposited on the outer peripheral surface 72B, the liquid chamber 67 and the pressure adjusting chamber 68 are separated from each other. The ink flow path (opening 79) is properly opened and closed, and the effect that the valve unit 50A as a valve mechanism operates stably and normally can be obtained.

As shown in FIG. 12, in the valve unit 50A according to the present embodiment, the inclined portion 45 (the first inclined portion 46, the second inclined portion 47) is formed similarly to the valve unit 50 of the first embodiment. May be good. As a result, the adhesive 81 arranged between the valve seat 600 and the opening member 70 tends to flow in the direction from the opening 79 toward the third surface 73, and flows in the direction from the third surface 73 toward the opening 79. Since it becomes difficult to do so, it is possible to achieve the effect that the adhesive 81 does not easily protrude inside the opening 79.
Further, regardless of the presence or absence of the inclined portion 45, as shown in FIG. 12, in the valve unit 50A according to the present embodiment, the first inclined surface 72A may be provided as in the valve unit 50 of the first embodiment. By providing the first inclined surface 72A closer to the opening 79 than the third surface 73, the ink is guided toward the opening 79 by the first inclined surface 72A and easily flows to the side of the opening 79.
Further, regardless of the presence or absence of the inclined portion 45, as shown in FIG. 12, in the valve unit 50A according to the present embodiment, the first inclined surface 72A is formed by the water repellent film 77, similarly to the valve unit 50 of the first embodiment. It does not have to be covered. By increasing the hydrophilicity of the first inclined surface 72A close to the ink flow path to that of the outer peripheral surface 72B, air bubbles can be easily discharged from the valve unit 50A, and the air exhaust property (bubble discharge property) of the valve unit 50A is enhanced. It can have the effect of being able to.

It should be noted that the opening 79 of the opening member 70 is not arranged inside the recess 91 of the valve seat 600 in a plan view, but the recess 91 of the valve seat 600 is arranged inside the opening 79 of the opening member 70 in a plan view. It may be in a state.

<Manufacturing method of valve unit>
FIG. 13 is a process flow showing a method for manufacturing a valve unit according to the present embodiment. 14A and 14B are diagrams corresponding to FIG. 9F, and are schematic views showing the state of the process shown in FIG. 13.
Hereinafter, the outline of the manufacturing method of the valve unit 50A according to the present embodiment will be described with reference to FIGS. 13, 14A, and 14B.

As shown in FIG. 13, the method for manufacturing the valve unit 50 according to the present embodiment includes a step of arranging the adhesive 81 (step S12) and a step of crimping the valve seat 600 and the opening member 70 (step S22). , A step of curing the adhesive 81 (step S23).
Note that step S12 is an example of "a step of arranging a fixing member between the valve seat and the first surface". Step S22 and step S23 are examples of the "step of crimping the valve seat and the first surface".

In step S12, the adhesive 81 is placed on the convex portion 64 of the valve seat 600 (not shown).
In step S22, as shown in FIG. 14A, the heat tool 250 is brought closer to the convex portion 64 of the valve seat 600 and the opening member 70 while adjusting the position of the heat tool 250. Subsequently, the opening member 70 is pressed by the heated heat tool 250, and the valve seat 600 and the opening member 70 are crimped.

In step S23, as shown in FIG. 14B, the heated heat tool 250 maintains the state of pressing the opening member 70, and the heat of the heat tool 250 is propagated to the adhesive 81 to propagate the valve seat 600 and the opening member 70. The adhesive 81 placed between and is cured. When the adhesive 81 is a thermoplastic adhesive, the heating of the heat tool is stopped at this step, and the adhesive is cured by entering a cooling operation while pressing the adhesive.

However, the heat of the heat tool 250 is also propagated to the valve seat 600. For example, when the valve seat 600 is made of a thermoplastic resin such as polyethylene resin or polypropylene resin which is easily deformed by heat and the opening member 70 is pressed for a long time (when the heat of the heat tool 250 is propagated for a long time). The valve seat 600 is affected by the heat propagated from the heat tool 250, and the valve seat 600 on the side closer to the heat tool 250 is thermally deformed.

The heat of the heat tool 250 is propagated to the inside of the valve seat 600 from the surface of the valve seat 600 in contact with the adhesive 81. Therefore, the valve seat 600 is more susceptible to the heat of the heat tool 250 as it is closer to the surface of the valve seat 600 in contact with the adhesive 81, and the heat tool 250 is closer to the surface of the valve seat 600 in contact with the adhesive 81. It becomes less susceptible to the heat of.

If a hole 65 is provided on the surface of the valve seat 60 in contact with the adhesive 81 and the valve seat 60 is made of a resin that is easily thermally deformed, depending on conditions such as the temperature of the heat propagated from the heat tool 250, The surface of the valve seat 60 in contact with the adhesive 81 is thermally deformed, the diameter of the hole 65 provided in the surface of the valve seat 60 in contact with the adhesive 81 is shortened, and the diameter of the hole 65 is shortened, which may cause a problem. There is.
For example, if the diameter of the hole 65 provided on the surface of the valve seat 60 in contact with the adhesive 81 is shortened, there is a problem that the ink does not easily flow in the hole 65. Further, if the diameter of the hole 65 provided on the surface of the valve seat 60 in contact with the adhesive 81 becomes too short, the adhesive 81 may block the hole 65, or the valve seat 600 may come into contact with the valve body 54. However, there is a possibility that the movement of the valve body 54 may be hindered.

In the present embodiment, since the hole 65 is arranged so as to be away from the surface of the valve seat 600 in contact with the adhesive 81 by the recess 91, it is not easily affected by the heat propagated from the heat tool 250, and the heat tool 250 It is less likely to cause problems due to thermal deformation due to heat propagated from the hole, blockage of the hole, or shortening of the diameter of the hole 65.

That is, the convex portion 64 and the concave portion 91 are provided on the surface of the valve seat 600 in contact with the adhesive 81, and the convex portion 64 and the concave portion 91 are thermally deformed by the heat propagated from the heat tool 250. Specifically, in the convex portion 64, the side surface 64A is curved (overhangs) in the direction away from the valve body 54 due to the heat propagated from the heat tool 250. On the other hand, in the recess 91, the inner peripheral surface 91A is curved (overhangs) in the direction approaching the valve body 54 due to the heat propagated from the heat tool 250.

That is, since the side surface 64A of the convex portion 64 is curved in the direction away from the valve body 54, the problem that the side surface 64A of the convex portion 64 comes into contact with the valve body 54 is unlikely to occur.
Since the inner peripheral surface 91A of the recess 91 is arranged farther from the valve body 54 than the hole 65, even if the inner peripheral surface 91A of the recess 91 is curved in the direction approaching the valve body 54, the inner circumference of the recess 91 is The problem that the surface 91A comes into contact with the valve body 54 and the movement of the valve body 54 is hindered is suppressed.

As described above, in the manufacturing method according to the present embodiment, since the adverse effect of the heat propagated from the heat tool 250 is suppressed by providing the recess 91 in the valve seat 600, the manufacturing method according to the present embodiment is used. In the valve unit 50A, the valve body 54 operates normally, the ink flow path (opening 79) between the liquid chamber 67 and the pressure adjusting chamber 68 is properly opened and closed, and the valve unit 50A operates stably and normally. ..

(Embodiment 3)
FIG. 15 is a schematic view showing a valve opening state of the on-off valve according to the third embodiment. FIG. 16 is a schematic view showing a closed state of the on-off valve according to the present embodiment.
The printer 1 according to the first embodiment has a valve mechanism (valve unit 50) that opens and closes an ink flow path between the ink tank 8 and the recording head 20. The valve mechanism (valve unit 50) is for supplying ink to the recording head 20 as appropriate, and opens the valve when the ink is ejected from the recording head 20 and the ink pressure in the recording head 20 drops. It is an on-off valve that supplies ink to 20 and closes when ink is supplied to the recording head 20 and the ink pressure in the recording head 20 increases.

The printer according to this embodiment has another valve mechanism (opening / closing valve 100) between the ink tank 8 and the valve unit 50. The other valve mechanism (on-off valve 100) is for opening and closing the ink flow path connected to the recording head 20 when performing a cleaning process (choke cleaning process).
That is, the printer according to the present embodiment has a configuration in which the on-off valve 100 is added to the printer 1 according to the first embodiment.

The outline of the on-off valve 100 as a valve mechanism will be described below with reference to FIGS. 15 and 16. The on-off valve 100 is also an example of the "valve mechanism".
As shown in FIGS. 15 and 16, the on-off valve 100 has a valve seat 110, an opening member 70, and a film member 120 as a valve body. An adhesive 81 is arranged between the valve seat 110 and the opening member 70.
The opening member 70 and the adhesive 81 have the same configuration as that of the first embodiment.

The valve seat 110 is, for example, a member made of a thermoplastic resin, and has a concave portion 111, a hole 112, an inflow passage 113, and a convex portion 114. The recess 111 is sealed by the film member 120, and the area surrounded by the recess 111 and the film member 120 becomes the ink chamber 130. The hole 112 is connected to the inflow path 515 of the valve unit 50 and forms a part of the ink flow path communicating the ink chamber 130 and the valve unit 50. The inflow path 113 is connected to the supply pipe 10 and communicates the ink chamber 130 and the supply pipe 10.

The convex portion 114 is arranged inside the concave portion 111. The convex portion 114 serves as an alignment mark when the opening member 70 is attached to the valve seat 110. Further, a hole 112 is provided so as to penetrate the center of the convex portion 114.

The film member 120 is, for example, a synthetic resin film, and has gas barrier properties and flexibility. The film member 120 is adhered to the recess 111 of the valve seat 110 in a state where atmospheric pressure is applied to the outer surface of the film member 120.

The opening member 70 has the same configuration as that of the first embodiment, and has a third surface that intersects the first surface 71, the second surface 72, the first surface, and the second surface, and is arranged on the outer edge of the opening member 70. It has a 73 and an opening 79 that penetrates the first surface 71 and the second surface.

The opening 79 communicates with the hole 112 and forms a part of the ink flow path communicating the ink chamber 130 and the valve unit 50. The second surface 72 is covered with a water repellent film 77.

As in the first embodiment, the inclined portion 45 may be provided in the direction from the opening 79 toward the third surface 73 to increase the distance between the valve seat 110 and the first surface 71. As a result, the adhesive 81 tends to flow in the direction from the opening 79 toward the third surface 73, and less likely to flow in the direction from the third surface 73 toward the opening 79. Therefore, it is possible to suppress the possibility that the adhesive 81 flows to the side of the opening 79 and the opening 79 is blocked. Similarly, the first inclined surface 72A may be provided, or the first inclined surface 72A may not be covered with the water-repellent film 77.

As shown in FIG. 15, when the film member 120 is separated from the water-repellent film 77 of the opening member 70 and the opening 79 is opened, the ink flow path from the on-off valve 100 to the valve unit 50 is opened.

As shown in FIG. 16, for example, the film member 120 bends in a direction of reducing the volume of the ink chamber 130 due to an external force (compressed air, cam mechanism, etc.), and the film member 120 becomes the water-repellent film 77 of the opening member 70. When the contact is made and the opening 79 is closed, the ink flow path from the on-off valve 100 to the valve unit 50 is closed.

As described above, the on-off valve 100 is an on-off valve that opens and closes when the film member 120 separates and contacts the water-repellent film 77 of the opening member 70. A water-repellent film 77 is provided on the portion where the film member 120 comes into contact with each other, and the portion where the film member 120 comes into contact with each other repels ink and suppresses the deposition of ink components. Therefore, it is possible to suppress a problem that ink is deposited on the portion where the film member 120 comes into contact with each other and it becomes difficult for the film member 120 to close the opening 79.

In the printer according to the present embodiment, with the on-off valve 100 closed, the cap 12 abuts on the recording head 20 and sucks the inside of the cap 12 with a suction pump, and the on-off valve 100 is closed (opening 79). Negative pressure is accumulated in the ink flow path from the ink to the nozzle opening 334 of the recording head 20. The on-off valve 100 is set to be opened at a predetermined stage in which the negative pressure is sufficiently accumulated. By opening the on-off valve 100, ink flows in at once from the upstream side in an attempt to eliminate the negative pressure accumulated in the flow path on the downstream side of the opening 79 in the ink chamber 130, and the ink flow velocity is instantaneously increased. Flows. As a result, air bubbles and foreign substances remaining in the ink chamber 130 and the flow path downstream thereof are discharged together with the ink from the nozzle opening 334 of the recording head 20 at once.

That is, in the printer according to the present embodiment, after sufficiently accumulating negative pressure in the ink flow path, the on-off valve 100 is opened to move the gas remaining in the ink flow path or the thickened ink to the downstream side. It is possible to execute a chalk cleaning process that pushes out all at once. Therefore, the printer according to the present embodiment can more strongly discharge the gas and the thickened ink that remain in the ink flow path as compared with the printer according to the first embodiment.

In the present embodiment, the on-off valve 100 is provided at a place different from the valve unit 50, but the on-off valve 100 may be provided in the valve unit 50. Further, although a film member is used in this embodiment, the present invention is not limited to this as long as it is a flexible member. For example, a rubber film such as butyl rubber or silicone rubber may be used. The rubber film can be mounted by fitting the rubber film into the valve seat component and fixing it with the fixing component. It is better to use a rubber film for higher durability.

The present invention is not limited to the above-described embodiment, and can be appropriately modified within the scope of the claims and within the range not contrary to the gist or idea of the invention that can be read from the entire specification. Conceivable. Hereinafter, a modified example will be described.

(Modification example 1)
17A to 17E are schematic views showing an arrangement state of a valve seat and an opening member in the valve unit according to the first modification. Further, in FIGS. 17A to 17E, the components necessary for explanation are schematically shown, the components not necessary for explanation are omitted, and the adhesive 81 is not shown.
Further, the same components as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted. Further, the direction from the opening 79 to the third surface 73 in the first embodiment is referred to as the Z direction.
Hereinafter, preferable states of the inclined portions 45A to 45E will be described with reference to FIGS. 17A to 17E.

As shown in FIG. 17A, the first surface 71A of the opening member 70A intersects and inclines with respect to the Z direction. The first surface 61A of the valve seat 60A is parallel to the Z direction and is not inclined. Then, an inclined portion 45A is provided to lengthen the distance Da between the first surface 61A (valve seat 60A) and the first surface 71A (opening member 70A) in the Z direction.
That is, the inclined portion 45A is formed on the entire surface of the first surface 71A of the opening member 70A.

With this configuration, the adhesive 81 arranged on the inclined portion 45A has the valve seat 60 and the first surface 71A (opening) in the step of crimping the valve seat 60 and the opening member 70A (step S22 in the first embodiment). When the distance Da between the member 70A) is narrowed, the adhesive 81 tends to flow in the Z direction and does not easily flow in the direction opposite to the Z direction (direction toward the valve body 54). Can prevent a problem of contacting the valve body 54.

As shown in FIG. 17B, the first surface 71B of the opening member 70B is parallel to the Z direction and is not inclined. The first surface 61B of the valve seat 60B intersects and inclines with respect to the Z direction. An inclined portion 45B is provided to increase the distance Db between the first surface 61B (valve seat 60B) and the first surface 71B (opening member 70B) in the Z direction.
That is, the inclined portion 45B is formed on the entire surface of the first surface 71B of the opening member 70B.

With this configuration, the adhesive 81 arranged on the inclined portion 45B has the valve seat 60 and the first surface 71B (opening) in the step of crimping the valve seat 60 and the opening member 70B (step S22 in the first embodiment). When the distance Db between the member 70B) is narrowed, the adhesive 81 tends to flow in the Z direction and does not easily flow in the direction opposite to the Z direction (direction toward the valve body 54). Can prevent a problem of contacting the valve body 54.

As shown in FIG. 17C, the first surface 71C of the opening member 70C intersects and inclines with respect to the Z direction. Similarly, the first surface 61C of the valve seat 60C also intersects and inclines with respect to the Z direction. An inclined portion 45C is provided to increase the distance Dc between the first surface 61C (valve seat 60C) and the first surface 71C (opening member 70C) in the Z direction.
That is, the inclined portion 45C is formed on the entire surface of the first surface 71C of the opening member 70C.

With this configuration, the adhesive 81 arranged on the inclined portion 45C has the valve seat 60 and the first surface 71C (opening) in the step of crimping the valve seat 60 and the opening member 70C (step S22 in the first embodiment). When the distance Dc between the member 70C) is narrowed, the adhesive 81 tends to flow in the Z direction and does not easily flow in the direction opposite to the Z direction (direction toward the valve body 54). Can be prevented from coming into contact with the valve body 54.
As described above, the inclined surfaces (surfaces intersecting in the Z direction) for providing the inclined portions 45A to 45C may be provided on at least one of the valve seats 60A to 60C and the opening members 70A to 70C.

In FIG. 17A, the entire first surface 71A of the opening member 70A intersects and inclines in the Z direction, but a part of the first surface 71D of the opening member 70A intersects and inclines in the Z direction. It may be.
That is, as shown in FIG. 17D, the convex portion 95 is provided on the first surface 71D of the opening member 70D, and the first surface is on the Z direction side and the side opposite to the Z direction with respect to the top 96 of the convex portion 95. The 71D is inclined in different directions with respect to the Z direction. On the other hand, the first surface 61D of the valve seat 60D is parallel to the Z direction and is not inclined.

With this configuration, the inclination Dd between the first surface 61D (valve seat 60D) and the first surface 71D (opening member 70D) is lengthened in the Z direction with respect to the top 96 of the convex portion 95. A portion 45D is provided, and on the side opposite to the Z direction with respect to the top 96 of the convex portion 95, the first surface 71D (opening member 70D) with the first surface 61D (valve seat 60D) in the direction opposite to the Z direction. An inclined portion is provided to lengthen the interval Dd with and from.
That is, the inclined portion 45D is partially formed on the first surface 71D of the opening member 70D.

The adhesive 81 arranged on the inclined portion 45D is attached to the valve seat 60 and the first surface 71D (opening member 70D) in the step of crimping the valve seat 60 and the opening member 70D (step S22 in the first embodiment). When the distance Dd between the adhesives is narrowed, the adhesive 81 arranged on the Z direction side with respect to the top 96 of the convex portion 95 tends to flow in the Z direction and flows in the direction opposite to the Z direction (toward the valve body 54). Since it becomes difficult to flow in the direction), it is possible to prevent a problem that the adhesive 81 arranged on the Z direction side with respect to the top 96 of the convex portion 95 comes into contact with the valve body 54.

Further, the convex portion 95 may be provided on the first surface 61E of the valve seat 60E.
That is, as shown in FIG. 17E, the first surface 61E of the valve seat 60E has a convex portion 95, and has different directions on the Z direction side and the opposite direction side to the Z direction with respect to the top 96 of the convex portion 95. It is tilted. On the other hand, the first surface 71E of the opening member 70E is parallel to the Z direction and is not inclined.
With this configuration, on the Z-direction side with respect to the top 96 of the convex portion 95, an inclined portion that lengthens the distance De between the first surface 61E (valve seat 60E) and the first surface 71E (opening member 70E) in the Z direction. 45E is provided, and on the side opposite to the Z direction with respect to the top 96 of the convex portion 95, the first surface 61E (valve seat 60E) and the first surface 71E (opening member 70E) are provided in the direction opposite to the Z direction. An inclined portion for lengthening the interval De is provided.
That is, the inclined portion 45E is partially formed on the first surface 71E of the opening member 70E.

The adhesive 81 arranged on the inclined portion 45E is attached to the valve seat 60 and the first surface 71E (opening member 70E) in the step of crimping the valve seat 60 and the opening member 70E (step S22 in the first embodiment). When the distance De between them is narrowed, the adhesive 81 arranged on the Z direction side with respect to the top 96 of the convex portion 95 tends to flow in the Z direction and flows in the direction opposite to the Z direction (toward the valve body 54). Since it becomes difficult to flow in the direction), it is possible to prevent a problem that the adhesive 81 arranged on the Z direction side with respect to the top 96 of the convex portion 95 comes into contact with the valve body 54.
The convex portion 95 may be provided on both the valve seat 60 and the opening member 70.

In this way, between the valve seats 60D and 60E and the first surfaces 71D and 71E of the opening members 70D and 70E, the valve seats 60D and 60E and the opening member 70D are in the direction opposite to the Z direction (direction toward the valve body 54). , 70E with the first surfaces 71D, 71E, even if the valve seats 60D, 60E and the opening members 70D, 70E have the first surfaces 71D, 71E If it has inclined portions 45D and 45E that lengthen the intervals Dd and De, it is within the technical application range of the present application.

Further, the number of inclined portions 45D and 45E for lengthening the distances Dd and De between the valve seats 60D and 60E and the first surfaces 71D and 71E of the opening members 70D and 70E in the Z direction may be singular or plural.
Similarly, the number of inclined portions 45 in the first embodiment may be singular or plural. Further, the place where the inclined portion 45 is formed in the first embodiment is not limited to the edge of the opening 79 and the outer edge of the opening member 70, and may be between the edge of the opening 79 and the opening member 70.

(Modification 2)
In the first embodiment, the opening member 70 is fixed to the valve seat 60 by the adhesive 81, but the opening member 70 may be fixed to the valve body 54 by the adhesive 81. When the opening member 70 is fixed to the valve body 54, the seal portion 58 is preferably fixed to the valve seat 60.

In this modification, the opening member 70 fixed to the valve body 54 separates and comes into contact with the seal portion 58 fixed to the valve seat 60. The surface of the opening member 70 fixed to the main body 55 of the valve body 54 is the first surface 71, and the surface of the opening member 70 that is separated from and abutted by the seal portion 58 fixed to the valve seat 60 is the second surface 72. Become. With such a configuration, the same effect as that of the first embodiment can be obtained.
In this way, the first surface 71 of the opening member 70 is fixed to one of the valve seat and the valve body 54, and the second surface 72 of the opening member 70 is separated and abutted from the other of the valve seat 60 and the valve body 54. It suffices to have.

(Modification 3)
FIG. 18 is a schematic plan view showing a state of the opening member according to the modified example 3. FIG. 19 is a cross-sectional view of the opening member along the line GG of FIG.
In FIG. 18, the state of the first surface 171 of the opening member 170 is illustrated. Further, in FIG. 19, the valve seat 60 is shown by a chain double-dashed line.
Further, the same components as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.

As shown in FIGS. 18 and 19, the outer edge of the opening member 170 according to the third modification is the same as the outer edge of the opening member 70 according to the first embodiment, and is circular in a plan view. The opening member 170 intersects the first surface 171 facing the valve seat 60, the second surface 172 arranged to face the first surface 171, and the first surface 171 and the second surface 172, and is located on the outer edge of the opening member 170. It has a third surface 173 to be arranged, a fourth surface 174 arranged to face the third surface 173, and an opening 79 penetrating the first surface 171 and the second surface 172.

The second surface 172 includes a curved surface 172A that is curved in the direction from the first surface 171 to the second surface 172 at the edge of the opening 79, and an outer peripheral surface 172B that is arranged on the opposite side of the curved surface 172A from the opening 79. have. The outer peripheral surface 172B is covered with a water-repellent film 177, and the water repellency is enhanced as compared with the curved surface 172A. The seal portion 58 of the valve body 54 comes into contact with the outer peripheral surface 172B covered with the water-repellent film 177.

The first surface 171 includes an inclined surface 171A having a longer distance D from the valve seat 60 in the direction from the opening 79 toward the third surface 173 and a flat surface 171B having substantially the same distance D from the valve seat 60. Have. In FIG. 18, the area without shading or hatching is the opening 79, the area with shading is the inclined surface 171A, and the area with hatching is the flat surface 171B.

The flat surface 171B is arranged so as to be in contact with the valve seat 60. Further, the flat surface 171B has a ring portion 171B1 surrounding the opening 79 and four fan-shaped island portions 171B2 arranged between the ring portion 171B1 and the third surface 173 in a plan view.
The inclined surface 171A includes a ring portion 171A1 surrounding the ring portion 171B1 (opening 79) of the flat surface 171B and an extending portion 171A2 extending from the ring portion 171A1 (opening 79) toward the third surface 173 in a plan view. Have. Further, four extending portions 171A2 extending in the direction from the opening 79 toward the third surface 173 are arranged in the direction from the opening 79 toward the third surface 173.

Then, the distance D1 between the opening member 170 and the valve seat 60 both between the ring portion 171A1 of the opening member 170 and the valve seat 60 and between the extending portion 171A2 of the opening member 170 and the valve seat 60. An inclined portion 145 is formed to lengthen the portion. The inclined portion 145 has a portion surrounding the ring portion 171B1 (opening 79) and a portion extending from the opening 79 toward the third surface 173 in a plan view.
As described above, in the present modification, the inclined portion 145 has a different shape from the inclined portion 45 of the first embodiment in a plan view. Further, in the present modification, in a plan view, a portion where the ring portion 171A1 of the opening member 170 and the valve seat 60 are in contact with each other is provided between the inclined portion 145 and the opening 79. This point is also one of the differences from the first embodiment.

The adhesive 81 arranged on the inclined portion 145 has the valve seat 60 and the first surface 171 (opening member 170) in the step of crimping the valve seat 60 and the opening member 170 (step S22 in the first embodiment). When the space between them is narrowed, the adhesive flows in the direction from the opening 79 toward the third surface 173, and the adhesive 81 becomes difficult to flow toward the opening 79.
Further, since a portion where the ring portion 171A1 of the opening member 170 and the valve seat 60 are in contact with each other is arranged between the inclined portion 145 and the opening 79, the adhesive 81 is less likely to flow toward the opening 79.

(Modification example 4)
FIG. 20 is a view corresponding to FIG. 18, and is a schematic plan view showing a state of the opening member according to the modified example 4. In FIG. 20, the state of the first surface 181 of the opening member 180 is illustrated.
Further, the same components as those in the first embodiment are designated by the same reference numerals, and duplicate description will be omitted.
As shown in FIG. 20, the opening member 180 of this modification has a first surface 181 and a third surface 183 that intersects the first surface 181 and is arranged on the outer edge of the opening member 180, and an opening 79.
The first surface 181 of the opening member 180 is a surface facing the valve seat 60, and corresponds to the first surface 171 of the opening member 170 of the modification 3.

The first surface 181 of the opening member 180 is inclined in a groove 181A (inclined in the direction from the opening 79 toward the third surface 183) in which the distance from the valve seat 60 is increased in the direction from the opening 79 toward the third surface 183 in a plan view. The groove 181A) and the flat surface 181B having substantially the same distance from the valve seat 60 are provided. That is, the groove 181A of the first surface 181 corresponds to the inclined surface 171A of the first surface 171 of the modification 3. The flat surface 181B of the first surface 181 corresponds to the flat surface 171B of the first surface 171 of the modification 3. Further, in the drawing, the area without shading or hatching is the opening 79, the area with shading is the groove 181A, and the area with hatching is the flat surface 181B.

A plurality of grooves 181A extend radially in the direction from the opening 79 toward the third surface 183 in a plan view, and a plurality of grooves 181A are arranged. This modification does not have an inclined surface 171A (ring portion 171A1) surrounding the opening 79 in the modification 3. Further, in this modification, the groove 181A extending in the direction from the opening 79 toward the third surface 183 is larger than the extending portion 171A2 extending in the direction from the opening 79 toward the third surface 173 in the modification 3. It is formed.
These points are the main differences between the present modification and the modification 3.

Even with this configuration, an inclined portion is formed in which the distance between the groove 181A of the opening member 180 and the valve seat 60 is increased in the direction from the opening 79 toward the third surface 183, and the adhesive arranged in the inclined portion is formed. When the agent 81 narrows the distance between the valve seat 60 and the first surface 181 (opening member 180) in the step of crimping the valve seat 60 and the opening member 180 (step S22 in the first embodiment). , The adhesive 81 tends to flow in the direction from the opening 79 toward the third surface 183, and less likely to flow in the direction from the third surface 183 toward the opening 79.

The first surface 181 of the opening member 180 is not provided with a groove 181A inclined in the direction from the opening 79 toward the third surface 183, but is provided with a groove not inclined in the direction from the opening 79 toward the third surface 183. It may be a configuration. That is, a groove (flat groove) having substantially the same distance from the valve seat 60 may be provided.

The flow resistance of the adhesive 81 also changes by forming a plurality of grooves (flat grooves) having substantially the same distance from the valve seat 60 in a radial direction from the opening 79 toward the third surface 183. , The adhesive 81 tends to flow in the direction from the opening 79 toward the third surface 183, and does not easily flow toward the opening 79.
Further, in order to facilitate the flow of the adhesive 81 from the opening 79 toward the third surface 183, the density of the grooves (flat grooves) having substantially the same distance from the valve seat 60 is the density from the opening 79 to the third surface 183. It is preferable to raise the height in the direction toward the three surfaces 183. That is, it is preferable that the groove (flat groove) having substantially the same distance from the valve seat 60 is formed more densely on the third surface 183 side than on the opening 79 side.
That is, depending on the shape, number, and density of the grooves, the shape may be such that the flow path resistance between the opening member 180 and the valve seat 60 gradually decreases from the opening 79 side to the third surface side. As a result, the adhesive 81 can easily flow to the third surface 183 side rather than the opening 79 side.

(Modification 5)
In the first embodiment, the opening member 70 is made of SUS and fixed to the valve seat 60 with an adhesive 81.
Both the opening member 70 and the valve seat 60 may be made of a thermoplastic resin, and the opening member 70 may be fixed to the valve seat 60 by heat welding or laser welding. In this modification, a bonding layer (melted layer) in which the opening member 70 melted by heat during heat welding and the resin constituting the valve seat 60 are mixed is arranged between the opening member 70 and the valve seat 60. .. The joint layer (molten layer) arranged between the opening member 70 and the valve seat 60 functions as a fixing member.
That is, the "fixing member" in the present application includes the bonding layer (melted layer) in the present modification in addition to the adhesive 81 described above.
Even with such a configuration, when the opening member 70 and the valve seat 60 are melted by the heat at the time of heat welding, the melted opening member 70 and the valve seat 60 can be made difficult to flow toward the opening 79.

(Modification 6)
In addition, the above-described embodiments and modifications may be combined as appropriate.

50 ... Valve unit, 51 ... Lid member, 52 ... Spring, 53 ... Film member, 54 ... Valve body, 55 ... Main body, 56 ... Shaft, 57 ... Flange, 58 ... Seal, 59 ... Pressure receiving plate, 60 ... Valve seat, 64 ... Convex part, 65 ... Hole, 67 ... Liquid chamber, 68 ... Pressure adjustment chamber, 70 ... Opening member, 71 ... 1st surface, 72 ... 2nd surface, 73 ... 3rd surface, 74 ... 4 sides, 75 ... burrs, 76 ... burrs, 77 ... water repellent film, 79 ... openings, 81 ... adhesive.

Claims (25)

A valve seat with a hole that serves as a liquid flow path,
A valve body that opens and closes the flow path by relative movement with the valve seat,
A first surface fixed to one of the valve seat and the valve body, a second surface separated from the other of the valve seat and the valve body, and intersecting the first surface and the second surface. An opening member having a third surface and an opening penetrating the first surface and the second surface.
An adhesive that fixes one of the surfaces and the first surface,
An inclined portion that increases the distance between the one surface and the first surface in the direction from the opening toward the third surface.
A valve mechanism characterized by being equipped with. The second surface is provided with an inclined surface that increases the distance between the second surface and the third surface in the direction from the opening toward the third surface, closer to the opening than the third surface. The valve mechanism according to claim 1. The second surface further has an outer peripheral surface arranged on the side of the third surface with respect to the inclined surface.
The valve mechanism according to claim 2, wherein the outer peripheral surface has higher liquid repellency than the inclined surface. The opening member has burrs bent in the direction from the second surface toward the first surface at the edge of the opening.
The valve mechanism according to any one of claims 1 to 3, wherein the tip of the burr bites into one of the burrs. The inclined portion includes a first inclined portion arranged closer to the opening than the third surface, and a second inclined portion arranged closer to the third surface than the opening. The valve mechanism according to any one of claims 1 to 4, wherein the valve mechanism is characterized. A first recess, a second recess, a third recess, a partition partitioning the first recess and the second recess, and a hole provided inside the third recess to serve as a liquid flow path. With the valve seat to have
A valve body that opens and closes the flow path by relative movement with the valve seat,
A first surface fixed to the valve seat, a second surface with which the valve body comes into contact with each other, a third surface intersecting the first surface and the second surface, and the first surface and the second surface. An opening member having an opening that penetrates the
An adhesive that fixes the valve seat and the first surface,
Equipped with a,
The valve mechanism is characterized in that the third recess is arranged inside the first recess when viewed from the direction of relative movement . The valve mechanism according to claim 6, wherein the opening is arranged inside the third recess and the hole is arranged inside the opening when viewed from the direction of the relative movement. The valve according to claim 6 or 7, further comprising an inclined portion that increases the distance between the valve seat and the first surface in the direction from the opening toward the third surface. mechanism. Further, the second surface is provided with an inclined surface that increases the distance between the valve seat and the valve seat in the direction from the opening toward the third surface, closer to the opening than the third surface. The valve mechanism according to any one of claims 6 to 8, wherein the valve mechanism is characterized. The second surface further has an outer peripheral surface arranged on the side of the third surface with respect to the inclined surface.
The valve mechanism according to claim 9, wherein the outer peripheral surface has higher liquid repellency than the inclined surface. The second surface has an inner peripheral surface and an outer peripheral surface, and has an inner peripheral surface and an outer peripheral surface.
The inner peripheral surface is arranged closer to the opening than the outer peripheral surface when viewed from the direction of the relative movement.
The valve mechanism according to any one of claims 6 to 8, wherein the outer peripheral surface has higher water repellency than the inner peripheral surface. The inclined portion includes a first inclined portion arranged closer to the opening than the third surface, and a second inclined portion arranged closer to the third surface than the opening. The valve mechanism according to any one of claims 8 or 9 to 11 which cites claim 8 . The valve seat further has a convex portion protruding from the partition wall toward the first concave portion.
The valve mechanism according to any one of claims 6 to 12, wherein the first surface of the opening member is fixed to the convex portion of the valve seat. The valve mechanism according to claim 13, wherein the third concave portion is arranged inside the convex portion when viewed from the direction of the relative movement. The valve body has a seal portion that comes into contact with the second surface.
The valve mechanism according to claim 13 or 14, wherein the convex portion projects in a direction in which the seal portion is separated from the second surface. The valve mechanism according to any one of claims 13 to 15 , wherein the opening member is arranged inside the convex portion when viewed from the direction of the relative movement. The valve mechanism according to any one of claims 6 to 16, wherein the third recess has an inner peripheral surface that curves in a direction approaching the valve body. The one according to any one of claims 1 to 17 , wherein the flow path resistance between the valve seat and the first surface gradually decreases from the opening side toward the third surface side. Valve mechanism. It is a manufacturing method of the valve mechanism.
The valve mechanism
A valve seat with a hole that serves as a liquid flow path,
A valve body that opens and closes the flow path by relative movement with the valve seat,
A first surface fixed to one of the valve seat and the valve body, a second surface separated from the other of the valve seat and the valve body, and intersecting the first surface and the second surface. An opening member having a third surface and an opening penetrating the first surface and the second surface.
With
The step of arranging the adhesive between the one and the first surface, and
A step of moving the adhesive so that the distance between the one side and the first surface is narrowed so that the amount of movement of the adhesive is larger toward the third surface side than the opening side.
The step of curing the adhesive and
A method for manufacturing a valve mechanism, which comprises. Claim 19, wherein prior to the step of placing an adhesive forming said openings by punching the opening member in the direction toward the first surface from said second surface, and further comprising The method for manufacturing a valve mechanism according to. The method for manufacturing a valve mechanism according to claim 20 , further comprising a step of forming a liquid repellent film on the second surface before the step of forming the opening. In the step of forming the opening, a burr bent in the direction from the second surface toward the first surface is formed on the edge of the opening.
The method for manufacturing a valve mechanism according to claim 20 or 21 , wherein in the step of moving the adhesive, the tip of the burr bites into one of the burrs. It is characterized by comprising a step of providing a groove on the one surface or the first surface so that the flow path resistance between the one surface and the first surface gradually decreases from the opening side toward the third surface side. The method for manufacturing a valve mechanism according to any one of claims 19 to 22 . It is a manufacturing method of the valve mechanism.
The valve mechanism
A valve seat having a recess and a hole provided inside the recess to serve as a flow path for a liquid.
A valve body that opens and closes the flow path by relative movement with the valve seat,
A first surface fixed to the valve seat, a second surface with which the valve body comes into contact with each other, a third surface intersecting the first surface and the second surface, and the first surface and the second surface. An opening member having an opening that penetrates the
An adhesive that fixes the valve seat and the first surface,
With
The step of arranging the adhesive between the valve seat and the first surface, and
The step of crimping the valve seat and the first surface, and
A step of providing a groove in the valve seat or the first surface so that the flow path resistance between the valve seat and the first surface gradually decreases from the opening side to the third surface side.
A method for manufacturing a valve mechanism, which comprises. A valve seat having a recess and a hole provided inside the recess to serve as a flow path for a liquid.
A valve body that opens and closes the flow path by relative movement with the valve seat,
A first surface fixed to the valve seat, a second surface with which the valve body comes into contact with each other, a third surface intersecting the first surface and the second surface, and the first surface and the second surface. An opening member having an opening that penetrates the
An adhesive that fixes the valve seat and the first surface,
A valve mechanism characterized in that the flow path resistance between the valve seat and the first surface gradually decreases from the opening side toward the third surface side.

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